1 ## Process this file with autoconf to produce configure.
2 ## In general, the safest way to proceed is to run the following:
3 ## % aclocal -I . -I `pwd`/../autoconf && autoheader && autoconf && automake
5 # make sure we're interpreted by some minimal autoconf
8 AC_INIT(glog, 0.1.1, opensource@google.com)
9 # The argument here is just something that should be in the current directory
10 # (for sanity checking)
11 AC_CONFIG_SRCDIR(README)
13 AM_CONFIG_HEADER(src/config.h)
15 # Checks for programs.
19 AM_CONDITIONAL(GCC, test "$GCC" = yes) # let the Makefile know if we're gcc
22 AC_SUBST(LIBTOOL_DEPS)
24 # Check whether some low-level functions/files are available
27 # These are tested for by AC_HEADER_STDC, but I check again to set the var
28 AC_CHECK_HEADER(stdint.h, ac_cv_have_stdint_h=1, ac_cv_have_stdint_h=0)
29 AC_CHECK_HEADER(sys/types.h, ac_cv_have_systypes_h=1, ac_cv_have_systypes_h=0)
30 AC_CHECK_HEADER(inttypes.h, ac_cv_have_inttypes_h=1, ac_cv_have_inttypes_h=0)
31 AC_CHECK_HEADERS(syscall.h)
32 AC_CHECK_HEADERS(sys/syscall.h)
33 # For backtrace with glibc.
34 AC_CHECK_HEADERS(execinfo.h)
35 # For backtrace with libunwind.
36 AC_CHECK_HEADERS(libunwind.h, ac_cv_have_libunwind_h=1, ac_cv_have_libunwind_h=0)
37 AC_CHECK_HEADERS(ucontext.h)
39 AC_CHECK_SIZEOF(void *)
41 # These are the types I need. We look for them in either stdint.h,
42 # sys/types.h, or inttypes.h, all of which are part of the default-includes.
43 AC_CHECK_TYPE(uint16_t, ac_cv_have_uint16_t=1, ac_cv_have_uint16_t=0)
44 AC_CHECK_TYPE(u_int16_t, ac_cv_have_u_int16_t=1, ac_cv_have_u_int16_t=0)
45 AC_CHECK_TYPE(__uint16, ac_cv_have___uint16=1, ac_cv_have___uint16=0)
47 AC_CHECK_FUNC(sigaltstack,
48 AC_DEFINE(HAVE_SIGALTSTACK, 1,
49 [Define if you have the `sigaltstack' function]))
51 AC_DEFINE(HAVE_DLADDR, 1,
52 [Define if you have the `dladdr' function]))
55 # We only care about these two attributes.
56 if test x"$ac_cv___attribute__" = x"yes"; then
57 ac_cv___attribute___noreturn="__attribute__ ((noreturn))"
58 ac_cv___attribute___printf_4_5="__attribute__((__format__ (__printf__, 4, 5)))"
60 ac_cv___attribute___noreturn=
61 ac_cv___attribute___printf_4_5=
65 if test x"$ac_cv___builtin_expect" = x"yes"; then
66 ac_cv_have___builtin_expect=1
68 ac_cv_have___builtin_expect=0
71 AX_C___SYNC_VAL_COMPARE_AND_SWAP
73 # On x86_64, instead of libunwind, we can choose to compile with frame-pointers
74 # (This isn't needed on i386, where -fno-omit-frame-pointer is the default).
75 AC_ARG_ENABLE(frame_pointers,
76 AS_HELP_STRING([--enable-frame-pointers],
77 [On x86_64 systems, compile with -fno-omit-frame-pointer (see INSTALL)]),
78 enable_frame_pointers=no)
79 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [return __x86_64__ == 1 ? 0 : 1])],
80 [is_x86_64=yes], [is_x86_64=no])
81 AM_CONDITIONAL(ENABLE_FRAME_POINTERS, test "$enable_frame_pointers" = yes)
82 AM_CONDITIONAL(X86_64, test "$is_x86_64" = yes)
84 # Some of the code in this directory depends on pthreads
87 # Check if there is google-gflags library installed.
88 AC_CHECK_LIB(gflags, main, ac_cv_have_libgflags=1, ac_cv_have_libgflags=0)
89 if test x"$ac_cv_have_libgflags" = x"1"; then
91 AC_DEFINE(HAVE_LIB_GFLAGS, 1, [define if you have google gflags library])
96 # We want to link in libunwind if it exists
98 # Unfortunately, we need to check the header file in addition to the
99 # lib file to check if libunwind is available since libunwind-0.98
100 # doesn't install all necessary header files.
101 if test x"$ac_cv_have_libunwind_h" = x"1"; then
102 AC_CHECK_LIB(unwind, backtrace, UNWIND_LIBS=-lunwind)
104 AC_SUBST(UNWIND_LIBS)
105 if test x"$UNWIND_LIBS" != x""; then
106 AC_DEFINE(HAVE_LIB_UNWIND, 1, [define if you have libunwind])
109 # We'd like to use read/write locks in several places in the code.
110 # See if our pthreads support extends to that. Note: for linux, it
111 # does as long as you define _XOPEN_SOURCE appropriately.
114 # Find out what namespace 'normal' STL code lives in, and also what namespace
115 # the user wants our classes to be defined in
117 AC_DEFINE_GOOGLE_NAMESPACE(google)
119 AC_CXX_USING_OPERATOR
121 # We want to access the "PC" (Program Counter) register from a struct
122 # ucontext. Every system has its own way of doing that. We try all the
123 # possibilities we know about. Note REG_PC should come first (REG_RIP
124 # is also defined on solaris, but does the wrong thing).
125 AC_MSG_CHECKING([how to access the program counter from a struct ucontext])
126 pc_fields=" uc_mcontext.gregs[[REG_PC]]" # Solaris x86 (32 + 64 bit)
127 pc_fields="$pc_fields uc_mcontext.gregs[[REG_EIP]]" # Linux (i386)
128 pc_fields="$pc_fields uc_mcontext.gregs[[REG_RIP]]" # Linux (x86_64)
129 pc_fields="$pc_fields uc_mcontext.sc_ip" # Linux (ia64)
130 pc_fields="$pc_fields uc_mcontext.uc_regs->gregs[[PT_NIP]]" # Linux (ppc)
131 pc_fields="$pc_fields uc_mcontext.gregs[[R15]]" # Linux (arm old [untested])
132 pc_fields="$pc_fields uc_mcontext.arm_pc" # Linux (arm new [untested])
133 pc_fields="$pc_fields uc_mcontext.mc_eip" # FreeBSD (i386)
134 pc_fields="$pc_fields uc_mcontext.mc_rip" # FreeBSD (x86_64 [untested])
135 pc_fields="$pc_fields uc_mcontext->ss.eip" # OS X (i386, <=10.4)
136 pc_fields="$pc_fields uc_mcontext->__ss.__eip" # OS X (i386, >=10.5)
137 pc_fields="$pc_fields uc_mcontext->ss.rip" # OS X (x86_64)
138 pc_fields="$pc_fields uc_mcontext->__ss.__rip" # OS X (>=10.5 [untested])
139 pc_fields="$pc_fields uc_mcontext->ss.srr0" # OS X (ppc, ppc64 [untested])
140 pc_fields="$pc_fields uc_mcontext->__ss.__srr0" # OS X (>=10.5 [untested])
142 for pc_field in $pc_fields; do
143 if ! $pc_field_found; then
144 AC_TRY_COMPILE([#define _GNU_SOURCE 1
145 #include <ucontext.h>],
146 [ucontext_t u; return u.$pc_field == 0;],
147 AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field,
148 How to access the PC from a struct ucontext)
149 AC_MSG_RESULT([$pc_field])
153 if ! $pc_field_found; then
154 AC_MSG_WARN(Could not find the PC. Will not output failed addresses...)
157 # These are what's needed by logging.h.in and raw_logging.h.in
158 AC_SUBST(ac_google_start_namespace)
159 AC_SUBST(ac_google_end_namespace)
160 AC_SUBST(ac_google_namespace)
161 AC_SUBST(ac_cv_cxx_using_operator)
162 AC_SUBST(ac_cv___attribute___noreturn)
163 AC_SUBST(ac_cv___attribute___printf_4_5)
164 AC_SUBST(ac_cv_have___builtin_expect)
165 AC_SUBST(ac_cv_have_stdint_h)
166 AC_SUBST(ac_cv_have_systypes_h)
167 AC_SUBST(ac_cv_have_inttypes_h)
168 AC_SUBST(ac_cv_have_uint16_t)
169 AC_SUBST(ac_cv_have_u_int16_t)
170 AC_SUBST(ac_cv_have___uint16)
171 AC_SUBST(ac_cv_have_libgflags)
172 AC_SUBST(GFLAGS_LIBS)
174 # Write generated configuration file
175 AC_CONFIG_FILES([Makefile src/glog/logging.h src/glog/raw_logging.h src/glog/vlog_is_on.h src/glog/stl_logging.h])